1. calculate the area of a conducting material with a temperature of 25degree conducting a heat quantity of 142kcal/hr and later reduced to a temperature of 15 degree. 2. The area of the conducting material is 152metre square with a proportionality constant. If the area given is 152 metre square, calculate the material using the above parameters+​

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.